Talk to Zdravko Mediu in the Rookery

Find some explosives

-head South west and talk to the Beggar (give him 100gp)

- head to the newly opened shop Arkady and buy the explosives for 1200

-head to the yellow marker on the mini-map

-plant the explosives on the outflow

-kill the Dark Alchemist

-return to Zdravko


500xp + 1500gp + ??

Gives the quest Roaming monsters